Turn into npm package

[NikolajDL]

This is an older library from before the npm package manager became popular. To make this library more widely available, it would be neat to have it published to the npm registry.

This issue is about preparing the solution to be published.

[silenteyesoncode]

what we need to do in this

[NikolajDL]

Basically just create a package.json file with the proper information and ensure the code can be imported by more modern methods like import slider from 'excolo-slider'. This jQuery plugin was built using the AMD pattern, back when RequireJS were popular, so it might not be compatible with ES6 imports or CommonJS modules as it stands right now.